i imagine it would be hard going from a merit-based grading system to a strict law school curve. though you are right, the upper level classes are much different than 1L classes.
did you find a good supplement/outline? from my limited experience in law school (1L), i'm not convinced outlines and supplements help that much. most people that i know who did very well took what they knew, after learning as much as they could on their own, and focused on mastering that for exams. they did a lot better than people who knew a wide variety of more limited information. if i was you i might just focus on learning it as best you can, talking to the professor about it as much as possible, even reading outside materials that further details your knowledge on the matter. being a grad student, you're probably already good at that.
so really, i'm not convinved those over-generalized supplements help an incredible amount, unless you need specific help with certain areas that you don't understand.